A fairly simple one. I will only describe how the seek bar works, and part of how commands are recognized by arduino (arduino code). I will do another one about bluetooth another day.

[sourcecode language=”cpp”]
byte packet[2];
int pIndex;int rPin = 9;
int yPin = 10;
int gPin = 11;byte rValue = 0;
byte yValue = 0;
byte gValue = 0;

void setup() {
Serial.begin(9600);
}

void loop() {

// see if there’s incoming serial data:
if (Serial.available() > 0) {
packet[pIndex++] = Serial.read();
}

if(pIndex >= 2){

switch(packet[0]){
case ‘r’:
rValue = packet[1];
break;
case ‘y’:
yValue = packet[1];
break;
case ‘g’:
gValue = packet[1];
break;
default:
;
}

analogWrite(rPin, rValue); // 0 – 255
analogWrite(yPin, yValue);
analogWrite(gPin, gValue);

Serial.print(packet[0],);
Serial.print(" ");
Serial.println(packet[1]);

pIndex = 0;

}

delay(100);
}
[/sourcecode]

[sourcecode language=”java”]
SeekBar sr;
SeekBar sy;
SeekBar sg;
byte srValue;
byte syValue;
byte sgValue;
[/sourcecode]

[sourcecode language=”java”]
sr.setMax(255);
sy.setMax(255);
sg.setMax(255);
[/sourcecode]

[sourcecode language=”java”]
sr.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener(){

public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
tv1.setText("Red " + progress);
srValue = (byte) progress;
}

public void onStopTrackingTouch(SeekBar seekBar) {
String temp = "r";
byte bytes[] = temp.getBytes();

try {
outputStream.write(bytes);
} catch (IOException e) {
e.printStackTrace();
}

try {
outputStream.write(srValue);
} catch (IOException e) {
e.printStackTrace();
}
}

});
[/sourcecode]

I don’t have the full source code anymore, but I have the sourcecode for the APP i used to control my hexapod robot, go to that post and scroll down to the bottom.